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Physics

Physics
The unit of noise pollution (level) is :

Decibel
Decimal
None of these
Ppm

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Physics
Which of the following is the unit of perceived loudness of sound ?

Phon
Hertz
Sone
Decibel

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Physics
What is the full form of "RADAR" ?

Radio Detecting and Ranging
Radio Device and Ranging
Region Device and Ranging
Radio Detect and Rangs

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Physics
An electric iron of 750 W is used for S hours per day. Then the energy consumed in one day by the iron is:

600 units
60 units
6 units
0.6 units

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Physics
Which of the following is not an aerosol?

Dust
Fog
Smoke
Mud

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Physics
A solid needle placed horizontally on the surface of the water floats due to

Surface tension of water
Capillary action
Viscosity of water
Water pressure

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